Yamaha YST-SW325B - Manual - Sound Group Holdings

YST-SW325
Advanced YST II and QD-Base Subwoofer
NEW
PRODUCT
BULLETIN
Yamaha’s Advanced YST II and QD-Bass Technologies Give This Top Class
Subwoofer an Outstanding Combination of Power, Depth and Clarity.
Designed to Match the 325 A-PMD Series Speakers.
Black finish available
Advanced YST II (Yamaha Active Servo
Technology II)
QD-Bass (Quatre Dispersion Bass) Technology
PWM Digital Drive High Efficiency Amplifier
Linear Port for Minimizing Extraneous Noise
High 170W Dynamic Power
BASS (Bass Action Selector System)
20cm (8”) Multi-Range Driver with Magnetic
Shielding
25–180Hz Low Frequency Reproduction
Luxurious Wood Finish Cabinet
Auto Standby with Sensitivity Selector
(High, Low and Off)
Low (0.5W) Standby Power Consumption
Main Specifications
Dynamic Power
170 W
Output Power
(5 ohms, 100Hz, 10% THD) 150 W
Frequency Response
25–180 Hz
High Cut Filter
(Continuously Variable) 50–150 Hz
Driver
20cm (8”) multi-range
Standby Power Consumption 0.5 W
Dimensions (W x H x D) 315 x 380 x 374 mm
12-3/8” x 14-15/16” x 14-3/4”
Weight
13 kg; 28.7 lbs.
“d-cinema” is the slogan of Yamaha A/V products and
technology, reflecting our focus on digital technology
and our leadership in creating and refining digital
home theater.
P10016916W-YSTSW325@NPB_Cherry

YST-SW325 Subwoofer
NEW PRODUCT BULLETIN
QD-Bass Technology Allows Free
Placement
QD-Bass (Quatre
Dispersion Bass)
technology uses
down-firing drivers with square, pyramidshaped
reflective plates to radiate the
sound efficiently in four horizontal
directions. The reflective plates (not used
in competitors’ down-firing subwoofers)
negate any effects caused by the floor
surface and reduce resonance between
sound waves reflected from the floor and
the unit. Also, most other systems use
circular cones, but by radiating in four
directions to avoid the legs of the cabinet,
QD-Bass reduces turbulence caused by
reflection from the legs. Changing the
height of the square pyramid varies the
acoustic load, permitting relatively simple
high-cut adjustment and improved
bandpass properties.
The QD-Bass system provides
extraordinary power and smooth frequency
response from an extremely compact unit.
It also allows
greater
freedom of
placement,
since the
sound
radiates with
equal
effectiveness in all directions.
Advanced YST II for Awesome Deep
Bass
Yamaha's newly developed Advanced YST
II (Yamaha Active Servo Technology II)
combines negative-impedance and
constant-current principles to drive the
High-Amplitude
Bass Sound
Port
Signals of Low Amplitude
Air Woofer
(Helmholtz Resonator)
Cabinet
Advanced Negative-
Impedance Converter
Active
Servo
Processing
Amplifier
speaker cone with
even tighter control
than previously.
Using Advanced Negative Impedance
Converter (ANIC) circuits, this system
dynamically optimizes effective speaker
impedance to maintain excellent linearity.
This means more stable and accurate low
range response, not to mention higher
sound pressure levels, for more natural
and energetic bass reproduction.
PWM Digital Drive High Efficiency
Amplifier
The YST-SW325 delivers high power
outputs at deep bass levels, with
excellent stability and low power
consumption, even with their compact
cabinets. This is made possible by a
highly efficient power amplifier.
The power amplifier achieves
superior conversion efficiency by
supplying maximum power (minimizing
power loss) from the power transistors
according to the output level. It delivers
stable power output with high efficiency
Signals
while minimizing power consumption and
heat production. It does not require an
output filter coil, resulting in extremely low
noise and distortion. High speed transient
response is also excellent.
Linear Port
The Linear Port provides smooth bass
response during playback and minimizing
extraneous noise.
Advanced YST II produces rich bass sound,
and the addition of a Linear Port reduces
extraneous noise for even higher quality.
BASS
The BASS (Bass Action Selector System)
function lets you switch between Movie
and Music modes, providing the optimum
frequency response in each case.
Environmentally Friendly
Internal parts and circuit boards do not
contain lead, which is often used in other
subwoofer brands, and is harmful to the
environment. Both models also have a
low-power standby mode, in which power
consumption is only 0.5W.
Other Notable Features
• 20cm (8”) Multi-Range Driver with
Magnetic Shielding
• 25–180Hz Low Frequency
Reproduction
• Auto Standby with Sensitivity Selector
(High, Low and Off)
NS-325F
3-Way Bass-Reflex
Speaker System
NS-M325
2-Way Acoustic Suspension
Speaker System
NS-C325
2-Way Dual-Woofer Acoustic
Suspension Center Channel
Speaker System
YST-SW325
Advanced YST II and
QD-Bass Subwoofer
The YST-SW325 is designed to acoustically match the
speakers in the 325 A-PMD Series, and is
recommended to be sold together with them.
• Product designs and specifications are subject to change without notice.
The 325 A-PMD series
speakers and YST-SW325
offer with cherry and black
finish.